The correct answer is b. al, mg, li
That's because Cobalt is not a representative element since it's not found in the first 2 or the last 6 groups.
Since an argumentative speech is an influential discourse in which the presenter tries to convince his audience to change their standpoints on a provocative subject. So rewriting this will give us this kind of speech: "Do you play sports? Have you ever given soccer, cricket, or field hockey a try? You might be surprised to learn that are the world's popular sports. Statistically speaking, they are more popular than typical American sports such as baseball and basketball.
